Hardener composition and associated forming method, uncured and cured epoxy resin compositions, and article
AssigneeSabic Global Technologies B.V.
InventorEdward Norman PETERS
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Abstract
A hardener composition is prepared by blending a low intrinsic viscosity hydroxyl-diterminated poly(phenylene ether), and an anhydride having structure (1) where q, Ra, and X are defined herein. The hardener composition exhibits glass transition temperature of −46 to +110° C., which is characteristic of the blend and distinct from the glass transition temperatures of the individual components. Also described are a method of forming the hardener composition, a curable epoxy composition incorporating the hardener composition, a cured composition formed from the curable epoxy composition, and an article that includes the cured composition.
Claims20
A hardener composition comprising, based on the total weight of the hardener composition:
- 1 to 80 weight percent of a hydroxyl-diterminated poly(phenylene ether) having an intrinsic viscosity of 0.03 to 0.2 deciliter per gram measured by Ubbelohde viscometer at 25° C. in chloroform;
- and
- 20 to 99 weight percent of an anhydride having structure (1)
- wherein q is zero or 1, Ra is C1-6-alkyl, and X is —CH2—, —(CH2)2—, —O—, or —S—;
- wherein the hardener composition exhibits a single glass transition temperature in the range −80 to +200° C., wherein the single glass transition temperature has a value of −46 to +110° C.;
- and
- wherein the hardener composition comprises zero to 1 weight percent total of solvents for the hydroxyl-diterminated poly(phenylene ether).
A method of forming a hardener composition, the method comprising:
- blending, based on the total weight of the hardener composition,
- 1 to 80 weight percent of a hydroxyl-diterminated poly(phenylene ether) having an intrinsic viscosity of 0.03 to 0.2 deciliter per gram measured by Ubbelohde viscometer at 25° C. in chloroform;
- and
- 20 to 99 weight percent of an anhydride having structure (1)
- wherein
- q is zero or 1,
- Ra is C1-6-alkyl, and
- X is —CH2—, —(CH2)2—, —O—, or —S—, to form the composition;
- wherein said blending is conducted in the presence of less than or equal to 1 weight percent total of solvents for the hydroxyl-diterminated poly(phenylene ether);
- wherein said blending is conducted at a temperature less than or equal to 150° C.;
- and
- wherein the composition exhibits a single glass transition temperature in the range −80 to +200° C., wherein the single glass transition temperature has a value of −46 to +110° C.
A curable epoxy composition comprising:
- a hydroxyl-diterminated poly(phenylene ether) having an intrinsic viscosity of 0.03 to 0.2 deciliter per gram measured by Ubbelohde viscometer at 25° C. in chloroform;
- an anhydride having structure (1)
- wherein q is zero or 1, Ra is C1-6-alkyl, and X is —CH2—, —(CH2)2—, —O—, or —S—;
- and
- an epoxy resin;
- wherein the hydroxyl-diterminated poly(phenylene ether), the anhydride having structure (1), and the epoxy resin are present in amounts effective to produce a mole ratio of epoxy groups derived from the epoxy resin to hydroxyl groups derived from the hydroxyl-diterminated poly(phenylene ether) of 5:1 to 400:1, and a mole ratio of epoxy groups derived from the epoxy resin to anhydride groups derived from anhydride having structure (1) of 0.5:1 to 50:1.
Dependencies are inferred from the claim text.